ASCA measurements also reported a great scatter in the metallicity of the IGrM. The ASCA study of NGC 5044 and HCG 51 reported metal abundances significantly higher than those of NGC 2300 and HCG 62 (also performed with ASCA) and more similar to clusters [1]}.
[2]} analyzed ASCA data for 17 groups with single apertures ranging from 4\(^{\prime }\)  to 30\(^{\prime }\)  finding in general low abundances in the range 0.15-0.6 Solar.
The higher temperature and mass objects with ASCA measurements reported by [3]}
showed an average abundance of 0.44 Solar consistent with that observed in rich clusters and therefore clearly highlighting the 1 keV regime as the one showing the spread to lower values of the abundance measurement.
